A knock or clonk over bumps usually points to worn drop links, bushes or top mounts. A car that bounces after a bump, leans heavily in corners, or wears tyres unevenly is telling you the same thing.
Worn suspension lengthens your stopping distance, so it is a safety issue as much as a comfort one.
We check the whole setup on a ramp — see what is involved on our suspension and steering page.
A wheel alignment check afterwards protects your new tyres.